RPM - DIV32 Problem

[davewanna]

Mister_e you are my hero!!

That was the problem, I wasn't using variables. I originally had it trying to divide by 3,000,000 but thought I might be over-flowing for some reason, and tried it at 300,000.

DIV32 was taking the last calculation using variables (rlow + rhigh /10) and therefore dividing rtotal by itself.. which was giving me a 1 while running, and a 0 while off...

All makes sense now really..

Just for interests sake, code now looks like

a = 50
b = 60000
...
  PULSIN PORTD.6,1,rlow                             
  PULSIN PORTD.6,0,rhigh                            
  rtotal = rlow + rhigh
  tbase = a * b
  rpm = div32 rtotal
  if rpm = 65535 then
    rpm = 0
  endif

Thankyou very much, many hours were wasted over that.

Now that I have it conquered, I will learn more about timers and interrupts.

[mister_e]

I knew there was a "fussy" code writing thing in that. Better explanation at the following link
http://www.picbasic.co.uk/forum/showthread.php?t=6931&

Glad to hear it works.